A Bleustein-Gulyaev-Shimizu wave resonator with 2 or 3 resonances for double traps in TV and VCR (VTR)

Michio Kadota, Junya Ago, Hideya Horiuchi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A Bleustein-Gulyaev-Shimizu (BGS) wave with only a shear-horizontal (SH) displacement has the property of complete reflection at the free edge of a piezoelectric ceramic substrate. A BGS wave resonator utilizing this property is super-miniature and wide band, has a small capacitance ratio, and does not require frequency tuning. At present, two kinds of BGS resonators have been used as the additional traps at fap and fas in TV·VCR VIF circuits. In this work, utilizing the responses generated due to the frequency characteristic of weighted IDT and even mode reflections at free edges of the substrate, we propose a new type of BGS resonator device which has two or three resonant frequencies for both fap and fas. By applying this resonator in a VIF circuit, we have confirmed that it produces sufficient attenuations for practical use at both fap and fas.

Original languageEnglish
Pages (from-to)3020-3023
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume35
Issue number5 B
DOIs
Publication statusPublished - 1996

Keywords

  • BGS wave
  • Double trap device
  • PZT
  • Resonator
  • VIF circuit

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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